RDS-37

RDS-37
Information
Country	Soviet Union
Test site	Semipalatinsk Test Site, Kazakh SSR
Period	November, 1955
Number of tests	1
Test type	Atmospheric Test
Device type	Fusion
Max. yield	Total yield 1.6 megatons of TNT (6.7 PJ)
Navigation
Previous test	RDS-27
Next test	RDS-41

RDS-37 was the Soviet Union's first "true" (staged) hydrogen bomb, first tested on November 22, 1955. The weapon had a nominal yield of approximately 3 megatons. It was scaled down to 1.6 megatons for the live test.

It was a multi-stage thermonuclear device which utilized radiation implosion called Sakharov's "Third Idea" in the USSR (the Teller–Ulam design in the USA). It utilized a dry lithium deuteride fusion fuel, with some of it replaced with a "passive material" to reduce its total yield. Despite this reduction in yield, because the weapon exploded under an inversion layer much of its shock wave was focused backward at the ground unexpectedly, causing a site building to collapse and kill three people.

It was air-dropped at Semipalatinsk Test Site, Kazakhstan, making it the first air-dropped two-stage thermonuclear test. The RDS-6s device (Joe-4) exploded in 1953 was labeled as a "hydrogen bomb" as well but was more similar to a "boosted" fission bomb than a megaton range hydrogen bomb.

See also

• RDS-1
• Soviet atomic bomb project
• Ivy Mike (first US hydrogen bomb)
• Castle Bravo (first US staged dry-fuel design)

References

• David Holloway, Stalin and the Bomb: The Soviet Union and Atomic Energy 1939-1956 (Yale University Press, 1995), ISBN 0-300-06664-3
• Alexei Kojevnikov, Stalin's Great Science: The Times and Adventures of Soviet Physicists (Imperial College Press, 2004), ISBN 1-86094-420-5
• Richard Rhodes, Dark Sun: The Making of the Hydrogen Bomb (Simon and Schuster, 1995), ISBN 0-684-80400-X

External links

• Soviet and Nuclear Weapons History
• Video of the RDS-37 Nuclear Test